KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > jstl > rt > CoreWhenTag


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */

28
29 package com.caucho.jstl.rt;
30
31 import com.caucho.jstl.ChooseTag;
32 import com.caucho.util.L10N;
33
34 import javax.servlet.jsp.JspException JavaDoc;
35 import javax.servlet.jsp.tagext.Tag JavaDoc;
36 import javax.servlet.jsp.tagext.TagSupport JavaDoc;
37
38 /**
39  * Tag representing an "when" condition.
40  */

41 public class CoreWhenTag extends TagSupport JavaDoc {
42   private static L10N L = new L10N(CoreWhenTag.class);
43   
44   private boolean _test;
45
46   /**
47    * Sets the test expression.
48    *
49    * @param test the test expression.
50    */

51   public void setTest(boolean test)
52   {
53     _test = test;
54   }
55
56   /**
57    * Process the tag.
58    */

59   public int doStartTag()
60     throws JspException JavaDoc
61   {
62     Tag parent = getParent();
63
64     if (! (parent instanceof ChooseTag))
65       throw new JspException JavaDoc(L.l("c:when tag must be contained in a c:choose tag."));
66
67     ChooseTag chooseTag = (ChooseTag) parent;
68
69     if (chooseTag.isMatch())
70       return SKIP_BODY;
71
72     if (_test) {
73       chooseTag.setMatch();
74       
75       return EVAL_BODY_INCLUDE;
76     }
77     else
78       return SKIP_BODY;
79   }
80 }
81
Popular Tags